List<? extends ValueSource> valueSources = createValueSources(model, projectDir, request, problems);
        List<? extends InterpolationPostProcessor> postProcessors = createPostProcessors(model, projectDir, request);

        InnerInterpolator innerInterpolator = createInterpolator(valueSources, postProcessors, request, problems);

            }
        });

        valueSources.add(prefixlessObjectBasedValueSource);

        return valueSources;
    }

    protected List<? extends InterpolationPostProcessor> createPostProcessors(
            final Model model, final Path projectDir, final ModelBuildingRequest config) {
        List<InterpolationPostProcessor> processors = new ArrayList<>(2);
        if (projectDir != null) {